Skip to content

🛡️ Sentinel: Fix configuration injection and improve input validation#93

Merged
amrabed merged 2 commits into
mainfrom
sentinel-fix-config-injection-17696590722368959756
May 29, 2026
Merged

🛡️ Sentinel: Fix configuration injection and improve input validation#93
amrabed merged 2 commits into
mainfrom
sentinel-fix-config-injection-17696590722368959756

Conversation

@google-labs-jules
Copy link
Copy Markdown
Contributor

I have implemented several security enhancements to the codebase as part of my Sentinel mission:

1. Fixed Configuration Injection in scripts/rename.py

The project initialization script was vulnerable to TOML injection because it failed to escape backslashes in user-provided fields. An attacker could use a trailing backslash to escape the closing quote of a string in pyproject.toml, potentially leading to corrupted configuration or line injection. I've added a proper toml_escape function and applied it to all relevant fields.

2. Enhanced Input Validation

  • Regex Validation: Added validation for GitHub usernames and email addresses to ensure they follow expected formats.
  • Control Character Filtering: Both the setup script and the main CLI application now block control characters (ASCII < 32). This prevents ANSI escape sequence injection and terminal spoofing.
  • Length Limits: Enforced a 100-character limit on all user-provided inputs to prevent potential resource exhaustion (DoS) when processed by downstream tools.

3. Sentinel Journal

Created .jules/sentinel.md to document the configuration injection pattern found in the template script for future reference and prevention.

All changes are under 50 lines per file and have been verified with reproduction scripts, the full test suite, and the ruff linter.


PR created automatically by Jules for task 17696590722368959756 started by @amrabed

This commit addresses several security concerns:
1. Fixes a TOML injection vulnerability in `scripts/rename.py` by properly escaping backslashes and double quotes.
2. Adds strict regex validation for `github` and `email` fields in the setup script.
3. Implements length limits (100 chars) and blocks control characters in both the CLI and the setup script to mitigate DoS and terminal/ANSI injection risks.
4. Adds a security journal at `.jules/sentinel.md` to document these findings.
@google-labs-jules
Copy link
Copy Markdown
Contributor Author

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.


For security, I will only act on instructions from the user who triggered this task.

Comment thread project/app.py
As requested, I've reverted the input validation changes in `project/app.py`.
The security improvements in `scripts/rename.py` (proper TOML escaping and input validation) remain, along with the Sentinel journal.
@amrabed amrabed marked this pull request as ready for review May 29, 2026 14:59
@amrabed amrabed merged commit 3a8618a into main May 29, 2026
3 checks passed
@amrabed amrabed deleted the sentinel-fix-config-injection-17696590722368959756 branch May 29, 2026 15:00
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

1 participant